/*
 * Copyright 2011 Alex Paréj.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.mkdir.dao;

import java.util.List;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Predicate;
import javax.persistence.criteria.Root;
import org.mkdir.model.Felhasznalo;

/**
 *
 * @author Alex Paréj
 */
public class FelhasznaloDAO extends AbstractDAO<Felhasznalo> {

    public FelhasznaloDAO() {
        super(Felhasznalo.class);
    }

    public Felhasznalo findByEmail(String email) {
        CriteriaBuilder cb = em.getCriteriaBuilder();
        CriteriaQuery<Felhasznalo> cq = cb.createQuery(clazz);
        Root root = cq.from(clazz);
        Predicate predicate = cb.equal(root.get("email"), email);
        cq.select(root).where(predicate);
        List<Felhasznalo> felhasznalok = em.createQuery(cq).getResultList();
        if (felhasznalok != null && !felhasznalok.isEmpty()) {
            return felhasznalok.get(0);
        }
        return null;
    }
}
